![[BACK]](/icons/back.gif){kind=icon}
Return to devopen.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / arch / alpha / stand / netboot|
Return to devopen.c CVS log | Up to [local] / sys / arch / alpha / stand / netboot |
1.1 nbrk 1: /* $OpenBSD: devopen.c,v 1.4 2003/06/02 23:27:44 millert Exp $ */
2: /* $NetBSD: devopen.c,v 1.3 1997/04/06 08:41:25 cgd Exp $ */
3:
4: /*-
5: * Copyright (c) 1992, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Ralph Campbell.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: * @(#)devopen.c 8.1 (Berkeley) 6/10/93
36: */
37:
38: #include <lib/libsa/stand.h>
39:
40: /*
41: * Decode the string 'fname', open the device and return the remaining
42: * file name if any.
43: */
44: devopen(f, fname, file)
45: struct open_file *f;
46: const char *fname;
47: char **file; /* out */
48: {
49: register char *cp;
50: register char *ncp;
51: register struct devsw *dp;
52: register int c, i;
53: int ctlr = 0, unit = 0, part = 0;
54: char namebuf[20];
55: int rc;
56:
57: cp = (char *)fname;
58: ncp = namebuf;
59:
60: #if 0
61: /* look for a string like '5/rz0/vmunix' or '5/rz3f/vmunix */
62: if ((c = *cp) >= '0' && c <= '9') {
63: ctlr = c - '0';
64: /* skip the '/' */
65: if (*++cp != '/')
66: return (ENXIO);
67: cp++;
68: while ((c = *cp) != '\0') {
69: if (c == '/')
70: break;
71: if (c >= '0' && c <= '9') {
72: /* read unit number */
73: unit = c - '0';
74:
75: /* look for a partition */
76: if ((c = *++cp) >= 'a' && c <= 'h') {
77: part = c - 'a';
78: c = *++cp;
79: }
80: if (c != '/')
81: return (ENXIO);
82: break;
83: }
84: if (ncp < namebuf + sizeof(namebuf) - 1)
85: *ncp++ = c;
86: cp++;
87: }
88: *ncp = '\0';
89: } else if (strchr(cp, '(')) {
90: /* expect a string like 'rz(0,0,0)vmunix' */
91: while ((c = *cp) != '\0') {
92: if (c == '(') {
93: cp++;
94: break;
95: }
96: if (ncp < namebuf + sizeof(namebuf) - 1)
97: *ncp++ = c;
98: cp++;
99: }
100:
101: /* get controller number */
102: if ((c = *cp) >= '0' && c <= '9') {
103: ctlr = c - '0';
104: c = *++cp;
105: }
106:
107: if (c == ',') {
108: /* get SCSI device number */
109: if ((c = *++cp) >= '0' && c <= '9') {
110: unit = c - '0';
111: c = *++cp;
112: }
113:
114: if (c == ',') {
115: /* get partition number */
116: if ((c = *++cp) >= '0' && c <= '9') {
117: part = c - '0';
118: c = *++cp;
119: }
120: }
121: }
122: if (c != ')')
123: return (ENXIO);
124: cp++;
125: *ncp = '\0';
126: } else {
127: #endif
128: dp = devsw;
129: ctlr = unit = part = 0;
130: goto fnd;
131: #if 0
132: }
133:
134: for (dp = devsw, i = 0; i < ndevs; dp++, i++)
135: if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0)
136: goto fnd;
137: printf("Unknown device '%s'\nKnown devices are:", namebuf);
138: for (dp = devsw, i = 0; i < ndevs; dp++, i++)
139: if (dp->dv_name)
140: printf(" %s", dp->dv_name);
141: printf("\n");
142: return (ENXIO);
143: #endif
144:
145: fnd:
146: rc = (dp->dv_open)(f, ctlr, unit, part);
147: if (rc)
148: return (rc);
149:
150: f->f_dev = dp;
151: if (file && *cp != '\0')
152: *file = cp;
153: return (0);
154: }